Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (3): 398-403.DOI: 10.12068/j.issn.1005-3026.2019.03.018

• Mechanical Engineering • Previous Articles     Next Articles

Integrated Variable Gain LQR Control of Seat Suspension and Automobile Suspension

GUO Li-xin, CHEN Cong-gen, ZHAO Lin   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2018-01-08 Revised:2018-01-08 Online:2019-03-15 Published:2019-03-08
  • Contact: GUO Li-xin
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Abstract: Based on the fuzzy control theory and optimal control theory, an integrated variable gain LQR(linear quadratic regulator)control method based on fuzzy control for vehicle active suspension and seat active suspension is proposed. Based on the establishment of "car-chair" three-degree-of-freedom dynamics model, taking the vertical acceleration of vehicle body and seat vertical acceleration as the control target and the dynamic displacement of the wheel and the range of vehicle suspension motion less than the specified value as the constraint conditions, the vehicle suspension and seat suspension variable gain LQR controller is designed, and the simulation experiment analysis and the comparison with Matlab/Simulink are carried out, whose results indicate that this control method has better control effect on seat suspension and vehicle suspension, and the validity and feasibility of the integrated variable gain LQR control method are verified, which could provide a reference for the future research of suspension system control.

Key words: fuzzy control, active seat suspension, variable gain LQR control, vehicle active suspension, vehicle

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